Shelf



FIG. 1 shows a first perspective view of our design for a shelf;

FIG. 2 shows an elevational view of a first side thereof;

FIG. 3 shows an elevational view of a second side thereof, opposite saidfirst side;

FIG. 4 shows a top plan view thereof;

FIG. 5 shows a bottom plan view thereof;

FIG. 6 shows a front view thereof;

FIG. 7 shows a rear view thereof; and,

FIG. 8 shows a second perspective view thereof.

CLAIM The ornamental design for a shelf, as shown and described.